Oracle 10g 增加了drop database
命令,这样我们删除数据库会方便很多。 不过DROP DATABASE还是有一定的限制条件的:
一些错误
1.ORA-01586: database must be mounted EXCLUSIVE and not open for this
operation
SQL> conn / as sysdba
Connected.
SQL> drop
database;
drop database
*
ERROR at line 1:
ORA-01586: database must
be mounted EXCLUSIVE and not open for this operation
2.
ORA-12719: operation requires database is in RESTRICTED mode
SQL>
alter database close;
Database altered.
SQL> drop database;
drop
database
*
ERROR at line 1:
ORA-12719: operation requires database is
in RESTRICTED mode
解决办法
SQL> alter database close;
SQL> alter system enable restricted
session;
System altered.
SQL> drop database;
Database
dropped.
或者正确的命令
SQL>startup
mount
SQL>alter
system enable restricted session;
SQL>DROP
database;
限制条件(sql reference 原文):
drop database
- You must have the SYSDBA system privilege to issue this statement.
- The databasemust be mounted in exclusive and restricted mode
- it must be closed.
Restricted mode:
The RESTRICTED SESSION clause lets
you restrict logon to Oracle.
You can use this clause regardless of whether
your instance has the database dismounted or mounted, open or
closed.
Restricting Session Logons:
Example You may want to restrict logons if you are performing application
maintenance and you want only application developers with RESTRICTED SESSION
system privilege to log on.
To restrict logons, issue the following statement:
ALTER
SYSTEM ENABLE RESTRICTED SESSION;
You can then terminate any
existing sessions using the KILL SESSION clause of the ALTER SYSTEM
statement.
After performing maintenance on your application, issue the
following statement to allow any user with CREATE SESSION system privilege to
log on:ALTER SYSTEM DISABLE
RESTRICTED SESSION;
RESTRICTED
SESSION,允许你以约束的方式登录数据库。你可以使用这个子句无论数据库是否挂载或者是否打开。
总结-有四点:
1、拥有SYSDBA 权限。
2、数据以独享的方式被挂载, Oracle
启动存在两种方式:独占和共享,独占启动的选项是exclusive,表示只允许一个例程使用该数据。共享启动的参数是shared,表示允许多个例程并行使用该数据库。
3、以RESTRICTED SESSION 登录数据库。
4、数据库处于关闭状态。
DROP
DATABASE该命令的作用:
- When you issue this statement, Oracle Database drops the database and
deletes all control files and datafiles listed in the control file. - If the database used a serverparameter file (spfile), it is also
deleted. - Archived logs and backups are not removed, but you can use Recovery
Manager (RMAN) to remove them. - If the database is on raw disks, this statement does not delete the actual
raw disk special files.
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